Again, delta.com is going to keep you on DL metal (or, more specifically, JV metal) over the water. There are no JV flights from Atlanta to any SAS hub. So you're not going to find many itineraries with SAS metal and zero of them on the TATL leg.

"you can now book SAS flights through delta.com" is not the same as "you can book any SAS flight that you want through delta.com"